Power efficient paging for mobile users in a terrestrial and...

H - Electricity – 04 – Q

Patent

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H04Q 7/38 (2006.01) H04B 7/185 (2006.01) H04Q 7/08 (2006.01)

Patent

CA 2278103

A method of paging assigns a unique digital address to mobile stations (12) with each unique digital address being mapped into an orthogonal signal set which is then transmitted to all mobile stations (12). Each mobile station (12) then correlates a received orthogonal signal function against an orthogonal function corresponding to its address. More particularly, each orthogonal signal set comprises a binary orthogonal signal set such as a set of Rademacher-Walsh functions. Other well-known orthogonal function sets can be employed. For example, an mbit address can be partitioned into g binary sequences and each sequence is then uniquely mapped into one of 2 to the power of m/g orthogonal functions.

L'invention porte sur un procédé de radiomessagerie qui affecte une adresse numérique unique à des stations mobiles, chaque adresse numérique unique étant mise en correspondance avec un ensemble de signaux orthogonaux qui est ensuite transmis à toutes les stations mobiles. Chaque station mobile établit ensuite une corrélation entre une fonction de signaux orthogonaux reçus et une fonction orthogonale correspondant à son adresse. Plus particulièrement, chaque ensemble de signaux orthogonaux comprend un ensemble de signaux orthogonaux binaires tel qu'un ensemble de fonctions Rademacher-Walsh. D'autres ensembles de fonctions orthogonales très connus peuvent être utilisés. Par exemple, une adresse de m bits peut être divisée en g séquences binaires et chaque séquence est ensuite mise en correspondance unique avec l'une des 2?m/g¿ fonctions orthogonales.

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